Comminuting-machine.



H. A. HA-NNUM. GOMMINUTING MACHINE.

APPLICATION FILED 10170.27, 1910.

1,01 1,342. v Patented Dec. 12,1911.

WITNESSES: INVE TQH 17 .1; Q 5 BY .4 ,/e "f I I I I I I I I ATTORNEYSCOLUMBIA PLANOGRAPI! 60., WASHINGTON, D. c.

HENRY A. HANN'UM, 0F CAZENOVIA, NEWYORK.

COMMINUTING-MACHINE.

Specification of Letters Patent.

Application filed December 27, 1910.

Patented Dec. 12, 1911. Serial no. 599,360.

To all whom it may concern:

Be it known that I, HENRY A. HANNUM, of Cazenovia, in the county ofMadison and State of New York, have invented a certain new and usefulcomminuting-Machine, of which the following is a specification.

My invention relates to comminuting or grinding machines andparticularly to constructions whereby packing of the comminuted orpartly comminuted material at the bottom of the hopper is prevented, andwhereby there is minimum friction between the material being comminutedand the bottom of the hopper, and the invention consists in thecombinations and constructions hereinafter set forth and claimed.

In describing this invention reference is had to the accompanyingdrawing in which like characters designate corresponding parts in allthe views.

Figure 1 is an elevation of this comminuting machine. Fig. 2 isa planthereof on a reduced scale, parts being removed. Fig. 3 is a verticalsectional view thereof on a reduced scale. Figs. 4 and 5 arediagrammatic views along lines AA and B- B, Fig. 2, illustrating thecurvature of the upper face of the hopper bottom, the curvature of thehopper bottom of a machine on which my present machine is animprovement, being shown in dotted lines.

1 is the frame of this machine; 2 is the stationary bottom of thehopper, the bottom being supported by the frame and having a slot 3extending from the edge of the bottom toward the center thereof, thebottom also having a spherically-curved convex surface 4 approaching theslot at the opposite sides and one end thereof, and a conically orspherically-curved, annular concave surface 5 continuous of the convexsurface, and extending between such convex surface and the edge of thebottom.

6 is the cylindrical shell or wall of the hopper, said wall coactingwith a head 7 at the edge of the bottom, said shell being formed with anexternal annular toothed flange or gear ring 8. v

9 is the cutter head mounted on and rotatable with a main actuatingshaft 10 which is j ournaled in the frame 1 and extends horizontallycrosswise of, and beneath the hopper bottom 2. The cutter head 9projects through the slot 3 and is provided with peripheral inclinedcutters 11. The shaft is rotated in such direction as to move theportion of the cutter head projecting above the bottom of the hopperfrom the edge of such bottom toward the center thereof, as indicated bythe arrow in Fig. 1.

12 is a handle or crank mounted on one end of the shaft 10, and 13 is agear on the other end thereof, the gear 13 meshing with the gear 14mounted on a stud 15, supported by the frame, the gear 14 being fixed toa bevel gear 16 which meshes with the gear ring 8 to actuate the shell 6of the hopper.

17 is a follower movable downwardly in the hopper for forcing thematerial being comminuted as bones, toward the bottom and cutter head,the follower being substantially the same as that shown in my patent No.470,395 March 8, 1892.

In machines of this kind, as shown in my patent and in dotted linesFigs. 1 and 5, the bottoms have been formed convex throughout theirentire extent in order that a maximum surface of the cutter head mightbe used above the bottoms, and the comminuted or partly comminutedmaterial packs around the edgeof the bottom and forms in a solid ringshaped mass. In this machine, owing to the arrangement of the convex andconcave surfaces of the bottom, the portion of the bottom between theconvex surface near the slot and the margin of the bottom, is depressedbelow a surface generatedby a straight line tangent to such convexsurface and the edge portion of the bottom and moving about the axis ofthe hopper or high portion of the bottom as a center, so that bones orother material being comminuted bear on the bottom only at two points,thus reducing the frictional contact between the matter being comminutedand the bottom; and owing to the direction of movement of the rotarycutter head, the packing of material along the margin of the bottom isprevented.

What I claim is:

1. A comminuting machine comprising a hopper having its bottom formedwith a high central portion and a low portion around the high portion,and a slot opening through the high portion thereof, the portion of thebottom between the slot and the edge of the bottom being depressed belowa surface generated by a straight line touching the high portion of thebottom and the edge thereof and moving about the high portion as acenter, and a rotary cutter head projecting through the slot,substantially as and for the purpose described.

2. A comminuting machine comprising a hopper having its bottom formedwith a slot and with an annular concave upper surface and aspherically-curved convex surface continuous of the concave surface andapproaching the slot, and a rotary cutter head projecting through theslot above the convex surface thereof, substantially as and for thepurpose set forth.

3. A comminuting machine comprising a hopper having its bottom formedwith a slot, and with a spherically-curved convex surface approachingthe slot, and an annular concave surface between the convex surface andthe edge of the bottom and continuous of the convex surface, and arotary cutter head projecting through the slot and above the convexsurface, substantially as and for the purpose specified.

4. A comminuting machine comprising a hopper having its bottom formedwith a slot extending from the edge toward the center of the bottom andterminating near the center of the bottom, and a rotary cutter headprojecting through the slot into the hopper the cutter head beinglocated near one side of the hopper so that its periphery runs close tosuch side, the portion of the cutter head above the bottom moving fromthe edge toward the center of the bottom, substantially as and for thepurpose set forth.

5. A comminuting machine comprising a hopper having a non-movable bottomformed with a slot extending from the edge toward the center of thebottom and terminating near the center thereof and with a convex uppersurface approaching the slot and terminating short of the edge of thebottom, the portion of the bottom between the apex of the upper surfaceand the edge of the bottom being depressed below a surface generated bya straight line tangent to the convex portion of the bottom and to theedge portion thereof, and moving about the axis of the hopper as acenter, and a rotary cutter head projecting through the slot into thehopper, a portion of the cutter head above the bottom moving from theedge toward the center of the bottom, substantially as and for thepurpose specified.

6. A comminuting machine comprising a hopper having a non-movable bottomformed with a slot extending from the edge thereof toward the center,and with a convex upper surface approaching the slot, and a concavesurface between the convex surface and the edge of the bottom, andcontinuous of the convex surface, and a cylindrical shell mounted on thebottom and movable about an axis, and a rotary cutter head projectingthrough the slot in the hopper, the portion of the cutter head above theconvex surface moving from the edge of the bottom toward the centerthereof, substantially as and for the purpose set forth.

In testimony whereof, I have hereunto signed my name in the presence oftwo attesting witnesses, at Syracuse, in the county of Onondaga, in theState of New York, this 14th day of December, 1910.

HENRY A. HANNUM.

Witnesses:

S. DAVIS, G. B. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

